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OCC-based Cellulose Nanofibril and Its Reinforcing Effect on Recycled Papermaking
Received:June 24, 2022  
DOI：DOI：10.11980/j.issn.0254-508X.2023.02.003
Key Words:OCC  KMnO4  cellulose nanofibril  recycled papermaking  white water
Fund Project:陕西省专家服务计划（2022WGZJ-11）； 中国-中东欧大学联合办学项目（2021099）；陕西省重点产业创新链项目（2020ZDLGY11-03）；纤维素生物转化中酶/细胞共固定体系的构建及机制研究（20210407）。
Author NameAffiliationPostcode
LIU Yali College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
ZHANG Sufeng* College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
LI Nan College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
LI Lei College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
ZHU Xinyue College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
DENG Tingting College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
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Abstract:Old corrugated container （OCC） was pretreated oxidation by potassium permanganate， reaching the microfiber separation point， then combined with a slight homogenization treatment. The OCC-based cellulose nanofiber （OCNF） was efficiently obtained with a yield of approximate 70%. The OCNF had good nanometer size with the aspect ratio of 313， the Zeta potential was -21.0 mV， and the crystallinity was 69.23%. The OCNF films had good mechanical properties（stress of 44.16 MPa， strain of 5.82%， and elastic modulus of 2.55 MPa） and optical properties （transmittance of approximate 60%）. The obtained 5% OCNF was applied to OCC papermaking， and the tensile index， tear resistance index， and folding endurance of recycled paper increased by 27.74%， 40.97%， and 228.57%， respectively. The quality of white water had also been greatly improved， and the turbidity， suspended solids， and CODCr had been reduced by 59.10%， 48.08%， and 42.17%， respectively.
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